$ git clone -n https://gitee.com/little-huaduo/llvm.git /var/lib/mock/dist-an23-build-503512-74854/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-503512-74854/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 7813f388345ce294ade95d4ca2b79afa62a6572d:KOJI_FETCH_HEAD
From https://gitee.com/little-huaduo/llvm
 * [new ref]         7813f388345ce294ade95d4ca2b79afa62a6572d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7813f38 Add Sw64 support for llvm